Nut-lock.



J. F. COLHNS.

NUT 0106K.

APPLICATION FILED AUG. Z. IBI5- RENUNED DEC. 8. 1917.

Patented July 16,1918.

, Jams E Cris.

' INVENTOR UNITED STATES rn'ru'r orn rcn.

JAMES F. C(ILLINS, OF PITTSBURGH, PENNSYLVANIA., ASSIGNOR 0F ONE-THIRD TO FREDERICK T. ASCHMAN AND FIFTY-ONE ONE-HUNDREDTHS T0 WILLIAM F. PHILLIPS, BOTH OF PITTSBURGH, PENNSYLVANIA.

nor-Loon.

Specification of Letters Patent.

Patented July 1c, 1918.

Application filed August 7, 1915, Serial No. 44,194. Renewed December 8,1917. serial No. 206,329.

nientsin Nut-Locks, ofwhich the following is a specification.

The present invention appertainsto an improved nut lock which employs the elastic gripping action of a washer or plate for securely holding the nut against being slackened or backed off from the bolt, and also for securely holding the washer itself against dislodgment.

The invention is primarily for the purpose of providing a nut lock of this character which shall be simple in construction and operation and comparatively inexpensive in first cost, and which will be efiicient in resisting the action of shocks or strains in service which would tend to loosen the nut or washer on the bolt. 7

The invention essentially resides in the peculiar construction of the elastic gripping washer which is threaded on the bolt and adapted to frictionally lock itself between the bolt threads and the .castellated or rounded head of the nut, as will more fully be pointed out hereinafter.

In the accompanying drawings I have illustrated one complete embodiment of my invention and a modification thereof, constructed according to the best modes I have So far devised for the of the principles of my invention.

Figure 1 is a side elevation of a bolt and nut with my improved locking washer applied thereto.

Fig. 2 is an end view of Fig. 1 showing the washer and nut and bolt. Fig. 3 is an elevation of the washer, showin its inner side. Fig. 4 is a side elevation s owing the threaded end of the bolt with nut and washer applied, as seen at right angles to the position of Fig. 1. vation of a modified washer threaded on the end of a bolt. Fig. 6 is an elevation of this washer from its inner side. Fig. 7 is an edge view of the washerof Figs. 5 and 6. Fig. 8 is an enlarged detail sectional View illustrating theposition of the elastic washer action takes place. Fig.

before the gripping but showing the washer 9 is a similar v ew,

practical application Fig. 5 is a side 'elelocked to the bolt and nut by the friction of its elastic gripping action.

The washer 1, which is preferably of steel or wroughtiron and possesses the characteristics of flexibility and elasticity, is threaded at 2 to screw on the threads 3 of the standardbolt 4 upon which the nut 5 is to be" locked. V The washer is generally fiat and rectangular in shape, its lower end 6 however being longer than the upper portion 7 in order that an ofiset or shoulder 8 may be fashioned to project beyond the body of the washer at its inner side with relation to the nut. In Fig. 1, particularly, it will be seen that the lower portion 6 of the washer is beveled or inclined with relation to the body portion of the washer, and that one corner, as 9, is still further bent at an angle to the beveled portion 6 of the washer. These spe cial features, the offset or shoulder 8, the beveled portion or tongue 6 of the washer, and the turned lip or bent corner 9 of the tongue 6 are the factors in locking the washer between the threads of the bolt and the rounded or curved head 10, of the nut. In the modified form of the washer illustrated in Figs. 5 6 7 an extension 11 is provided which makes the threaded portion of the washer of greater thickness and consequently provides for a wider bearing on the bolt through its threads. An additional feature is the curved portion 12 which aids in rendering the gripping action of the washer more rigid.

It will be noted that the two sides of the portion 7 of the washer are parallel, and that the beveled faces of the portion 6 of the washer, although at an angle to the plane of the faces or sides of the portion 7, are parallel with each other.

In use, the nut is turned home on the bolt, and then the washer is threaded on the bolt end and turned up to the position indicated in Fig. 8 until the washer contacts with the nut. Greater pressure is now applied by means of a wrench and the washer is screwed up against the the shoulder or in between the threads offset 8 (Fig. 9) is jammed of the bolt and the eled portion of the washer is brought into nut and 1t will be seen that close contact with the rounded or curved portion of the head of the nut. Still further movement of the washer causes the lip or bent earner 9 to' inipiiige against and turn over the rounded edge 13 of the nut, seen'j in'Fi'g: 9." In this position the washer is seon'rel'ytloolre'd against accidental dislodg ment, and can only bolt by the application of great power to. a

Wrench. It will be noted that the nut cannot be advanced on the bolt because the turned wine? or; lipwhich overhangs the" mutate head of the QI JQ P IQXGD DS ,SHClLmOYQIQQQt. VVhile I have" illnstitited the wtsh'er 5p e M? h e e l wh l r be apparen that it is appn ableg e "any other standerd l lf u -en 2 b; e id' fi 'flibw ehe isifeeldy for use without modif ing or altermg the typical niit and bolt;

cdfii' s" 6f tii'is it1it nii' be o'iitanidfoi 11 be turned ba'ck" ofl" the being beveled with 1'. A poly-sided Washer of flexible elastic iiihlt'ri'til' foffi'ied' with thi'eljded eiinifig and provided: with a shouldered onset, the portion of wliich sttid ofl-st forms a" part relation to the body of the Washer, and said beveled portion having an additionally bent corner.

- 23' Tlie'ooinbination with a screw bolt and en wi h. amende heed tfraz elmid d eliistic Washer having it beveled portion impinging over the and heyingaleoe bent corner oYer-hangjng en ltbewsi e W ..Qf.'- ;.09 ?S-;

In testimony whereogf I; affix my signature.

JAMES F. COLLINS.

,rplln dkheadof. the nut] 

